[MOC] Rough terrain crane

[BrickbyBrickTechnic]

Hey everyone,

After 3 weeks of constant building, my version of 42082 is finished! I achieved the grand majority of my goals for this MOC, but the main purpose of this project was to build a crane with more function in the given or smaller size with fewer pieces than 42082. And I succeeded! The final part count is under 3000, and the size is 63x20x20cm. Additional functions this this has that 42082 doesn't is:

• 2 stage boom
• 3 steering modes
• 2 winches rather than just 1, both with 2 speeds
• 2 stage outriggers (second stage manual)
• Suspension

Additionally, it has all the functions 42082 does have, and a more convenient gearbox controlling all function from 1 place. I could have added a Y-arrangement or a separate jib, but I ran out of beams 

So all in all, things worked out!

And some pictures:

So that's all I had a whale of a time making this thing work. And it was worth it IMO! I hope you think so too.

Looking forward to comment and criticism, but also comparisons!

BbBT

[1gor]

At the first sight I do not like yellow and red color combo on wheels, but functionality looks to work fine...I do not know about steering modes ?, but...

[Aventador2004]

I'm not saying its bad, but i would change the title to; "What 42082 Could Have Been".  To be honest 42082 is a lot better finished

[Aleh]

It's great you built thus beautiful crane in a couple of weeks!

11 minutes ago, Aventador2004 said:

I'm not saying its bad, but i would change the title to; "What 42082 Could Have Been".  To be honest 42082 is a lot better finished

Professionals designed it several month maybe.

But yes, I also offered some improvements, anyway.

[BrickbyBrickTechnic]

24 minutes ago, Aventador2004 said:

"What 42082 Could Have Been"

That makes too much sense. I changed the title.

[suffocation]

Good job, but the suspension travel is really limited. Sprung pendular axles need to have the springs mounted on a pivot.

Then again, I guess more suspension travel would make the three-mode steering problematic.

[Aventador2004]

41 minutes ago, BrickbyBrickTechnic said:

That makes too much sense. I changed the title.

Again, this is a great build, but just think that it is better that way.

Maybe use the Claas rims instead?

[BrickbyBrickTechnic]

8 hours ago, I_Igor said:

At the first sight I do not like yellow and red color combo on wheels, but functionality looks to work fine...I do not know about steering modes ?, but...

I thought it would look alright... Add a splash of color... As for the steering modes, the chassis works fine on its own, but with the superstructure there is some backlash.

7 hours ago, Aventador2004 said:

To be honest 42082 is a lot better finished

That is correct. I ran out of beams, so fenders and covering up weren't possible.

7 hours ago, Aleh said:

It's great you built thus beautiful crane in a couple of weeks!

Professionals designed it several month maybe.

But yes, I also offered some improvements, anyway.

Thanks! I wish I could have taken your improvements... But beams...

6 hours ago, suffocation said:

Good job, but the suspension travel is really limited. Sprung pendular axles need to have the springs mounted on a pivot.

Then again, I guess more suspension travel would make the three-mode steering problematic.

Thanks! The steering limited the suspension. I had to shorten it by a stud to get this range, so that's all.

[gate]

Don't know about others, but it looks complete to me. Nice capacity, but I bet the 2nd stage almost not moves when you load 0,5kgs+.

But that doesn't mean it's bad. Lego cranes require a lot of innovative solutions (just like the custom gear worm actuators), so well done!

[Erik Leppen]

Ever since the discussion about 42082's inflated part count it was a matter of time before someone made a crane that had all the functions with fewer parts. Yours has more functions, and pretty inventive ones at that. I wonder how you did the steering modes on a model with suspension. The Legov ersion has much better detailing, especially around the outriggers your model is kinda rough. I do like how it's slightly less "bulbous", although I'/m not a fan of the light-gray stuff on the sides, between the wheels. Especially that 5x7 frame looks a bit ugly there. Also, I tink you don't own the set (or don't wish to sacrifice it)? Otherwise I would expect you to re-use at least the large slewing ring. That's the one place where I think the official set beats your model, functionally.

The steering has a lot of play, the difference between the modes is hard to see on your video. I remember it to work better on 42054. It may not be solvable though, as you added suspension too. I do wonder how you made this work. Do you have a picture of the underside, or othe rpictures showing how the functions of the chassis work together?

What you lost in functionality, are the all-motorized outriggers. Yours have an additional manual step, which I think TLC wanted to avoid in their model. Your version of the outriggers look much weaker as well, but they are closer to how they work in real cranes.

The custom lifting cylinder looks a bit ugly, but what worries me more is that it seems to bend quite a lot, because of the gray 3x5 L beams that you used to connect it to the boom. I would have preferred the way the set did it, by having a liftarm stick out the bottom of the boom, and the hinge point being lower, so that it's in line with the cylinder.

[BrickbyBrickTechnic]

3 hours ago, gate said:

Don't know about others, but it looks complete to me. Nice capacity, but I bet the 2nd stage almost not moves when you load 0,5kgs+.

But that doesn't mean it's bad. Lego cranes require a lot of innovative solutions (just like the custom gear worm actuators), so well done!

Thank you! The second stage requires lots and lots of torque to deploy safely, so I don't see it moving with 0.5kg+.

1 hour ago, Erik Leppen said:

The Legov ersion has much better detailing, especially around the outriggers your model is kinda rough. I do like how it's slightly less "bulbous", although I'/m not a fan of the light-gray stuff on the sides, between the wheels. Especially that 5x7 frame looks a bit ugly there. Also, I tink you don't own the set (or don't wish to sacrifice it)? Otherwise I would expect you to re-use at least the large slewing ring. That's the one place where I think the official set beats your model, functionally.

Yes, I fully agree. The outriggers were the hardest place to decorate, especially considering that I ran out of black. The light gray was not meant to be light gray by any means. I ran out of black beams constructing the chassis and the boom's first stage, so the LBG was a result of lack of parts. I do not own the set, but even if I did I would not sacrifice it. The large slewing ring would have really saved me as the superstructure could have really benefitted from 1 or 2 studs more of elevation. If I could have reused it I would have.

1 hour ago, Erik Leppen said:

The steering has a lot of play, the difference between the modes is hard to see on your video. I remember it to work better on 42054.

It does work better on 42054 because the lever that controls the rear axle's angle sat directly on the rear axle. in the case of this crane, that cannot happen as a result of the suspension. Therefore one extra member needs to be added between the steering mech controls and the rear axle, which increased the play a lot. It actually worked fine when the superstructure was not attached to the chassis, but the added weight really caused the majority of the play. In 42054 there was a lot less weight on the axles.

1 hour ago, Erik Leppen said:

What you lost in functionality, are the all-motorized outriggers. Yours have an additional manual step, which I think TLC wanted to avoid in their model. Your version of the outriggers look much weaker as well, but they are closer to how they work in real cranes.

I don't think TLG cared about whether there's an extra step or not. What I think they realized is that they couldn't make 2 stage outriggers extend far enough to be significant. The 42043 had those outriggers and they didn't look like much albeit being a big feature of the model. As for my model having the manual step, without the red sliding 8t gears it became impossible for me to drive LA's on the tip of the outriggers. Before unifying the chassis, I spent a few days trying, but it didn't work out. I think the main culprit of this is that the housing takes up way more space they should; I found it very hard to engineer around them. Maybe TLG realized it too but didn't want to go with the 42009 setups, so they stuck with the outriggers they have.